In January 2018 Google announced an attack that makes it practically possible to leak information from kernel memory on the host operating system.

We have discovered that CPU data cache timing can be abused to efficiently leak information out of mis-speculated execution, leading to (at worst) arbitrary virtual memory read vulnerabilities across local security boundaries in various contexts.

Impact on Octopus Deploy

Octopus Deploy is not directly affected by these vulnerabilities. However, since the host operating system and underlying hardware can be vulnerable, any application running on affected systems can be affected. For your Octopus installation, this would include servers hosting:

Octopus Server.

Microsoft SQL Server which is hosting your Octopus database.

The targets of your deployments.

Mitigation

The mitigation for these vulnerabilities are all related to the host operating system and underlying hardware. There is no specific mitigation for Octopus Deploy.

For Microsoft operating systems follow these security advisories to ensure your host operating system and underlying hardware are protected against these vulnerabilities: